mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Parth SarthiandgVisor bot
9f2bfa55cc
Added pausing support for the timer(syntheticTimer) the `AfterFunc` now won't trigger when the kernel is paused. The timer waits for all the AfterFunc functions to complete during Pause. As of right now, all the AfterFunc callbacks are not heavy, so it's okay. When a new afterFunc is created: - The event is added to the synthetic timer queue. - AfterFuncScheduler sleeps until the next event in the queue. - Triggers the expired events and repeats the cycle. PiperOrigin-RevId: 971771243
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
// Copyright 2018 The gVisor Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package kernel
|
|
|
|
import (
|
|
"context"
|
|
|
|
"gvisor.dev/gvisor/pkg/sentry/ktime"
|
|
"gvisor.dev/gvisor/pkg/sentry/time"
|
|
)
|
|
|
|
// beforeSave is invoked by stateify.
|
|
func (t *Timekeeper) beforeSave() {
|
|
if t.stop != nil {
|
|
panic("pauseUpdates must be called before Save")
|
|
}
|
|
|
|
if t.clocks == nil {
|
|
t.restored = nil
|
|
return
|
|
}
|
|
|
|
// N.B. we want the *offset* monotonic time.
|
|
var err error
|
|
if t.saveMonotonic, err = t.GetTime(time.Monotonic); err != nil {
|
|
panic("unable to get current monotonic time: " + err.Error())
|
|
}
|
|
|
|
if t.saveRealtime, err = t.GetTime(time.Realtime); err != nil {
|
|
panic("unable to get current realtime: " + err.Error())
|
|
}
|
|
}
|
|
|
|
// afterLoad is invoked by stateify.
|
|
func (t *Timekeeper) afterLoad(context.Context) {
|
|
t.restored = make(chan struct{})
|
|
t.pausableClock = &ktime.SyntheticClock{}
|
|
t.afterFuncSchedulerWakeCh = make(chan struct{}, 1)
|
|
}
|